man/hostnamectl.xml

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   8   Copyright 2012 Lennart Poettering
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  23
  24 <refentry id="hostnamectl" conditional='ENABLE_HOSTNAMED'
  25     xmlns:xi="http://www.w3.org/2001/XInclude">
  26
  27   <refentryinfo>
  28     <title>hostnamectl</title>
  29     <productname>systemd</productname>
  30
  31     <authorgroup>
  32       <author>
  33         <contrib>Developer</contrib>
  34         <firstname>Lennart</firstname>
  35         <surname>Poettering</surname>
  36         <email>lennart@poettering.net</email>
  37       </author>
  38     </authorgroup>
  39   </refentryinfo>
  40
  41   <refmeta>
  42     <refentrytitle>hostnamectl</refentrytitle>
  43     <manvolnum>1</manvolnum>
  44   </refmeta>
  45
  46   <refnamediv>
  47     <refname>hostnamectl</refname>
  48     <refpurpose>Control the system hostname</refpurpose>
  49   </refnamediv>
  50
  51   <refsynopsisdiv>
  52     <cmdsynopsis>
  53       <command>hostnamectl</command>
  54       <arg choice="opt" rep="repeat">OPTIONS</arg>
  55       <arg choice="req">COMMAND</arg>
  56     </cmdsynopsis>
  57   </refsynopsisdiv>
  58
  59   <refsect1>
  60     <title>Description</title>
  61
  62     <para><command>hostnamectl</command> may be used to query and
  63     change the system hostname and related settings.</para>
  64
  65     <para>This tool distinguishes three different hostnames: the
  66     high-level "pretty" hostname which might include all kinds of
  67     special characters (e.g. "Lennart's Laptop"), the static hostname
  68     which is used to initialize the kernel hostname at boot (e.g.
  69     "lennarts-laptop"), and the transient hostname which is a fallback
  70     value received from network configuration. If a static hostname is
  71     set, and is valid (something other than localhost), then the
  72     transient hostname is not used.</para>
  73
  74     <para>Note that the pretty hostname has little restrictions on the characters and length used, while the static and
  75     transient hostnames are limited to the usually accepted characters of Internet domain names, and 64 characters at
  76     maximum (the latter being a Linux limitation).</para>
  77
  78     <para>The static hostname is stored in
  79     <filename>/etc/hostname</filename>, see
  80     <citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>5</manvolnum></citerefentry>
  81     for more information. The pretty hostname, chassis type, and icon
  82     name are stored in <filename>/etc/machine-info</filename>, see
  83     <citerefentry><refentrytitle>machine-info</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
  84
  85     <para>Use
  86     <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
  87     to initialize the system host name for mounted (but not booted)
  88     system images.</para>
  89   </refsect1>
  90
  91   <refsect1>
  92     <title>Options</title>
  93
  94     <para>The following options are understood:</para>
  95
  96     <variablelist>
  97       <varlistentry>
  98         <term><option>--no-ask-password</option></term>
  99
 100         <listitem><para>Do not query the user for authentication for
 101         privileged operations.</para></listitem>
 102       </varlistentry>
 103
 104       <varlistentry>
 105         <term><option>--static</option></term>
 106         <term><option>--transient</option></term>
 107         <term><option>--pretty</option></term>
 108
 109         <listitem><para>If <command>status</command> is invoked (or no explicit command is given) and one of these
 110         switches is specified, <command>hostnamectl</command> will print out just this selected hostname.</para>
 111
 112         <para>If used with <command>set-hostname</command>, only the selected hostname(s) will be updated. When more
 113         than one of these switches are specified, all the specified hostnames will be updated. </para></listitem>
 114       </varlistentry>
 115
 116       <xi:include href="user-system-options.xml" xpointer="host" />
 117       <xi:include href="user-system-options.xml" xpointer="machine" />
 118
 119       <xi:include href="standard-options.xml" xpointer="help" />
 120       <xi:include href="standard-options.xml" xpointer="version" />
 121     </variablelist>
 122
 123     <para>The following commands are understood:</para>
 124
 125     <variablelist>
 126       <varlistentry>
 127         <term><command>status</command></term>
 128
 129         <listitem><para>Show current system
 130         hostname and related
 131         information.</para></listitem>
 132       </varlistentry>
 133
 134       <varlistentry>
 135         <term><command>set-hostname <replaceable>NAME</replaceable></command></term>
 136
 137         <listitem><para>Set the system hostname to <replaceable>NAME</replaceable>. By default, this will alter the
 138         pretty, the static, and the transient hostname alike; however, if one or more of <option>--static</option>,
 139         <option>--transient</option>, <option>--pretty</option> are used, only the selected hostnames are changed. If
 140         the pretty hostname is being set, and static or transient are being set as well, the specified hostname will be
 141         simplified in regards to the character set used before the latter are updated. This is done by removing special
 142         characters and spaces. This ensures that the pretty and the static hostname are always closely related while
 143         still following the validity rules of the specific name. This simplification of the hostname string is not done
 144         if only the transient and/or static host names are set, and the pretty host name is left untouched.</para>
 145
 146         <para>Pass the empty string <literal></literal> as the
 147         hostname to reset the selected hostnames to their default
 148         (usually <literal>localhost</literal>).</para></listitem>
 149       </varlistentry>
 150
 151       <varlistentry>
 152         <term><command>set-icon-name <replaceable>NAME</replaceable></command></term>
 153
 154         <listitem><para>Set the system icon name to
 155         <replaceable>NAME</replaceable>. The icon name is used by some
 156         graphical applications to visualize this host. The icon name
 157         should follow the <ulink
 158         url="http://standards.freedesktop.org/icon-naming-spec/icon-naming-spec-latest.html">Icon
 159         Naming Specification</ulink>.</para>
 160
 161         <para>Pass an empty string to reset the icon name to the
 162         default value, which is determined from chassis type (see
 163         below) and possibly other parameters.</para></listitem>
 164       </varlistentry>
 165
 166       <varlistentry>
 167         <term><command>set-chassis <replaceable>TYPE</replaceable></command></term>
 168
 169         <listitem><para>Set the chassis type to
 170         <replaceable>TYPE</replaceable>. The chassis type is used by
 171         some graphical applications to visualize the host or alter
 172         user interaction. Currently, the following chassis types are
 173         defined:
 174         <literal>desktop</literal>,
 175         <literal>laptop</literal>,
 176         <literal>server</literal>,
 177         <literal>tablet</literal>,
 178         <literal>handset</literal>,
 179         <literal>watch</literal>,
 180         <literal>embedded</literal>,
 181         as well as the special chassis types
 182         <literal>vm</literal> and
 183         <literal>container</literal> for virtualized systems that lack
 184         an immediate physical chassis.</para>
 185
 186         <para>Pass an empty string to reset the chassis type to the
 187         default value which is determined from the firmware and
 188         possibly other parameters.</para>
 189         </listitem>
 190       </varlistentry>
 191
 192       <varlistentry>
 193         <term><command>set-deployment <replaceable>ENVIRONMENT</replaceable></command></term>
 194
 195         <listitem><para>Set the deployment environment description.
 196         <replaceable>ENVIRONMENT</replaceable> must be a single word
 197         without any control characters. One of the following is
 198         suggested:
 199         <literal>development</literal>,
 200         <literal>integration</literal>,
 201         <literal>staging</literal>,
 202         <literal>production</literal>.
 203         </para>
 204
 205         <para>Pass an empty string to reset to the default empty
 206         value.</para>
 207         </listitem>
 208       </varlistentry>
 209
 210       <varlistentry>
 211         <term><command>set-location <replaceable>LOCATION</replaceable></command></term>
 212
 213         <listitem><para>Set the location string for the system, if it
 214         is known. <replaceable>LOCATION</replaceable> should be a
 215         human-friendly, free-form string describing the physical
 216         location of the system, if it is known and applicable. This
 217         may be as generic as <literal>Berlin, Germany</literal> or as
 218         specific as <literal>Left Rack, 2nd Shelf</literal>.</para>
 219
 220         <para>Pass an empty string to reset to the default empty
 221         value.</para>
 222         </listitem>
 223       </varlistentry>
 224     </variablelist>
 225   </refsect1>
 226
 227   <refsect1>
 228     <title>Exit status</title>
 229
 230     <para>On success, 0 is returned, a non-zero failure code
 231     otherwise.</para>
 232   </refsect1>
 233
 234   <refsect1>
 235     <title>See Also</title>
 236     <para>
 237       <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 238       <citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 239       <citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 240       <citerefentry><refentrytitle>machine-info</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
 241       <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
 242       <citerefentry><refentrytitle>systemd-hostnamed.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
 243       <citerefentry><refentrytitle>systemd-firstboot</refentrytitle><manvolnum>1</manvolnum></citerefentry>
 244     </para>
 245   </refsect1>
 246
 247 </refentry>